//search button click
        private void btnSearch_Click(object sender, RoutedEventArgs e)
        {
            dgMovies.UnselectAll();



            //getting the right ID of each genre type in combo box
            string genre = "All";
            int    selectedGenreIndex = cbxGenre.SelectedIndex;
            int    selectedGenreID    = genreList[selectedGenreIndex].ID;

            genre = selectedGenreID.ToString();


            //getting selected item from year combo box
            int year;

            int.TryParse(cbxYear.SelectedValue.ToString(), out year);

            //getting key word value
            string keyword = txbKeyword.Text.ToString();


            if ((keyword == "") && (genre == "0") && year == 0)
            {
                txtMessage.Text = "Please Chose or write a key word to search!3";
            }

            else if (keyword != "" && year == 0 && genre == "0")
            {
                SearchResultMovies = MovieViewModel.SearchResultMovies(keyword, pagenum);
            }


            else
            {
                if (keyword == "")
                {
                    SearchResultMovies = MovieViewModel.GetMoviesBasedOnGenre(pagenum, genre, year);
                }

                else
                {
                    DiscoverMovieModel dmv = MovieViewModel.GetMoviesBasedOnGenre(pagenum, genre, year);
                    SearchResultMovies.Total_page = dmv.Total_page;
                    SearchResultMovies.Page       = dmv.Page;
                    SearchResultMovies.Results    = new List <RootDiscoverMovieModel>(dmv.Results.Where(x => x.Title.StartsWith(keyword)));
                }
            }
            page = SearchResultMovies.Page.ToString();


            totalpage          = SearchResultMovies.Total_page;
            txtPageNumMax.Text = $" ... {totalpage}";

            dgMovies.ItemsSource           = SearchResultMovies.Results;
            dgMovies.Columns[0].Visibility = Visibility.Hidden;
            dgMovies.Columns[5].Visibility = Visibility.Hidden;
            dgMovies.Columns[6].Visibility = Visibility.Hidden;
        }